INTERSECT vs INNER JOIN?!
INTERSECT and INNER JOIN are DIFFERENT! INTERSECT removes duplicates, JOIN doesn't. Same data, different results. This will break your logic!
#sql #sqltricks #intersect #innerjoin #setoperations #sqlweird #sqlquiz #codingchallenge #sqlshorts #sqlwtf #joins #advancedsql
Python Set Union Operation Explained
Can you guess the result? Python set union combines two sets. See what {1,2,3} | {3,4,5} creates. Perfect for data deduplication!
#python #pythontricks #codingtips #programmingtutorial #pythonsets #setunion #setoperations #pythonquiz #codingchallenge #pythonshorts #setmethods #pythondata
UNION ALL Preserves Duplicates?!
UNION ALL keeps ALL rows! UNION removes duplicates. This one keyword difference changes the entire result set. This will break your data!
#sql #sqltricks #union #unionall #duplicates #sqlweird #sqlquiz #codingchallenge #sqlshorts #sqlwtf #setoperations #advancedsql
NOT IN With NULL Returns FALSE Always?!
NOT IN with NULL in the list ALWAYS returns FALSE! Even if value is not in list, NULL breaks NOT IN logic completely! Watch!
#sql #sqltricks #database #sqltutorial #notin #null #sqlquiz #codingchallenge #sqlshorts #sqlbugs #setoperations #sqlwtf
EXCEPT vs NOT EXISTS?!
EXCEPT removes rows from first set! It's like subtraction for result sets. NOT EXISTS does similar but differently. This set operation will confuse you!
#sql #sqltricks #except #notexists #setdifference #sqlweird #sqlquiz #codingchallenge #sqlshorts #sqlwtf #setoperations #advancedsql
DISTINCT With Multiple NULLs?!
DISTINCT treats all NULLs as the same value! Multiple NULLs become one. This breaks uniqueness logic. Watch the reveal!
#sql #sqltricks #database #sqltutorial #distinct #nullhandling #sqlquiz #codingchallenge #sqlshorts #sqlbugs #setoperations #sqlwtf
UNION Removes NULL Duplicates?!
UNION treats multiple NULLs as duplicates and removes them! This breaks set theory. NULL = NULL in UNION? Watch the chaos!
#sql #sqltricks #database #sqltutorial #union #setoperations #sqlquiz #codingchallenge #sqlshorts #sqlbugs #nullhandling #sqlwtf
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